Description:
------------
Hi, 

when passing an an array to a lua function, the module will segfault:
php-fpm7.0[9786]: segfault at 5 ip 00007f6cec54b51c sp 00007ffe1292cc70 error 4 in lua.so[7f6cec547000+6000]

Example: Passing array('hello', 'world');

Passing array('what' => 'hello', 'where' => 'world'); (two-dimensional) works however.

Additionally, PHP 5.6 and lua-1.1.0 works as expected.
Maybe a bug in the upgrade to PHP7?

Test script:
---------------
<?php
$mylua = new \lua();
$mylua->eval(<<<CODE
    function nicefunction(args)
        print(args[1])
        return args[1]
    end
CODE
);

echo $mylua->call("nicefunction", array(array('hello', 'world')));
echo "Done!";


Expected result:
----------------
"hello" is displayed, then "Done!" is displayed

Actual result:
--------------
Segmentation fault (core dumped)